IIRC This saying was used to define pornography in a legal sense and it made me realize they mean because your member knows porn when you see it and ah reacts t

IIRC This saying was used to define pornography in a legal sense and it made me realize they mean because your member knows porn when you see it and ah reacts to it. But somehow I can't see courts pushing for an objective tent pitching index for imagery in place of porn experts.